EP0249047A2 - Arrangement for cooling rubber-coated large containers with fluid nitrogen - Google Patents
Arrangement for cooling rubber-coated large containers with fluid nitrogen Download PDFInfo
- Publication number
- EP0249047A2 EP0249047A2 EP87107007A EP87107007A EP0249047A2 EP 0249047 A2 EP0249047 A2 EP 0249047A2 EP 87107007 A EP87107007 A EP 87107007A EP 87107007 A EP87107007 A EP 87107007A EP 0249047 A2 EP0249047 A2 EP 0249047A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- container
- liquid nitrogen
- line
- nitrogen
- large containers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/0064—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by temperature changes
- B08B7/0092—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by temperature changes by cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for
- B23P11/02—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits
- B23P11/025—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits by using heat or cold
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/0004—Component parts, details or accessories; Auxiliary operations
- B29C63/0013—Removing old coatings
Definitions
- the invention relates to a device for cooling rubber-coated large containers with liquid nitrogen for the purpose of embrittlement and removal of the rubber coating according to the preamble of claim 1.
- the invention is therefore based on the object of providing a device which makes it possible to degumize even large containers by applying liquid nitrogen, without additional stresses being able to result which would damage the container material.
- liquid nitrogen is thus introduced in a known manner via a nozzle system into the container to be degummed.
- the nitrogen warms the container and the rubber coating, evaporates and flows outside through an exhaust pipe.
- the liquid nitrogen is not sprayed with it arbitrarily via the nozzle system, but rather is controlled in such a way that a homogeneous temperature field can build up.
- the cold gas circulation caused by the device according to the invention serves this purpose.
- the coldest nitrogen gas from the bottom of the tank is drawn off through the fan through the line and transported to the upper part of the tank, where the temperature of the nitrogen itself is higher.
- the cooling rate is also kept low, preferably between 10 and 20 K / h, an extraordinarily homogeneous temperature field is formed over the height of the container to be cooled.
- the thermal stresses resulting from the change in temperature and superimposing the residual stresses therefore remain negligibly small and occur evenly distributed in the container wall.
- the device according to the invention it is also possible to degumify containers made of materials by cooling with liquid nitrogen, which only have a low impact strength at low temperatures.
- the controlled cooling possible with the aid of the device according to the invention, with the formation of a homogeneous temperature field over the container height, does not cause permanent structural changes in ferritic or austenitic steel, nor does it cause changes in the mechanical strength values.
- the line and the associated fan can be designed as desired.
- the fan can also be placed anywhere on the line. However, it is advantageous if the fan is at the top Part of the line arranged cage impeller is formed, which radially ejects the sucked cold gas from the bottom of the container into the upper part of the container. However, this radial flow direction can also be brought about by deflection devices. If the fan is placed on the upper part of the line, its connection to the drive can be kept short.
- the drive itself is expediently outside the container.
- the line is expediently designed as a tube. In order to enable the device to be used in containers of different sizes, the tube is expediently designed to be adjustable in length. This can be achieved by means of two telescoping single tubes.
- a hose can also be used as a line.
- a corrugated hose there are also very simple options for adjusting the length of the line.
- a large container 1 is shown, the rubber coating of which embrittles when exposed to liquid nitrogen and should be blown up.
- the liquid nitrogen is sprayed into the interior of the container via two ring lines 2 provided with nozzles.
- the liquid nitrogen is removed from a standing tank 3 and passes through lines 4, 4a and 4b into the ring lines 2.
- the evaporated nitrogen gas escapes through the exhaust pipe 5 into the open.
- a corrugated hose 6 is arranged in the axial direction in the container, which extends into the bottom area of the large container 1.
- a fan 7 designed as a cage impeller is arranged, the electric drive 8 of which is located outside the large container 1.
- the fan 7 sucks the cold nitrogen gas from the bottom of the container through the corrugated hose 6 into the upper part of the large container 1.
- the sucked-in gas exits in the radial direction.
- the directions of flow are represented by arrows, not designated in any more detail.
- the evaporated nitrogen is therefore constantly circulated in the large container 1, in such a way that nitrogen is conveyed from the coldest part of the container into the warmest part.
- a quantity of gaseous nitrogen corresponding to the injected quantity of liquid nitrogen continuously escapes through the exhaust pipe 5.
- the cold gas circulation causes the formation of a very homogeneous temperature field over the height of the large container 1.
- the cooling rate is kept low. This is controlled by numerous temperature measuring points 9 by using a temperature measuring and control unit 10 to meter the liquid nitrogen through the solenoid valves 11 in the lines 4a and 4b into the ring lines 2 as required.
- a rigid tube can of course also be used.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Heat Treatment Of Articles (AREA)
- Disintegrating Or Milling (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
Description
Die Erfindung betrifft eine Vorrichtung zum Abkühlen von gummierten Großbehältern mit flüssigem Stickstoff zwecks Versprödung und Abtragung der Gummierung nach dem Oberbegriff des Anspruches 1.The invention relates to a device for cooling rubber-coated large containers with liquid nitrogen for the purpose of embrittlement and removal of the rubber coating according to the preamble of claim 1.
Zahlreiche Behälter der chemischen Industrie sind mit einer Gummierung ausgekleidet, um chemischen, thermischen oder mechanischen Beschädigungen entgegenzuwirken. Diese Gummierungen verschleißen mit der Zeit und müssen abgetragen und durch neue Gummierungen ersetzt werden. Das Abtragen der Gummierung kann mit Hilfe chemischer Lösungsmittel, durch Abbrennen oder durch rein manuelle Entfernung erfolgen. Diese Verfahren sind zeitaufwendig, kostenintensiv und teilweise umweltbelastend. Beim Abbrennen der Gummierung kann es auch zu Gefügeänderungen des Behälterwerkstoffes kommen. Man hat daher versucht, die Gummierung durch Eindüsen von flüssigem Stickstoff zu verspröden. Hierzu bringt man eine oder mehrere mit Düsen versehene Ringleitungen im Innern des Behälters an und sprüht durch die Düsen flüssigen Stickstoff in das Behälterinnere. Unter dem Einfluß der Kälte des verdampfenden Stickstoffes schrumpfen die Behälterwand, in der Regel aus Stahl, und die Behältergummierung. Wegen der unterschiedlichen Wärmeausdehnungskoeffizienten von Gummi und Stahl treten im Verbund Scherkräfte auf, die zu Beginn des Einkühlprozesses durch das elastische Verhalten der Gummierung kompensiert werden. Beim weiteren Einsprühen von flüssigem Stickstoff werden schließlich tiefe Temperaturen erreicht, nämlich -100 °C bis -150 °C, bei welchen die Gummierungen völlig aushärten und spröde werden. Sie können dann die immer größer werdenden Scherkräfte nicht mehr durch Formänderung kompensieren. Es kommt schließlich zur Zerstörung des Verbundes ohne daß äußere mechanische Kräfte auf ihn eingewirkt haben. Der vom Untergrund abgesprengte Gummi kann, nachdem der Behälter wieder Umgebungstemperatur angenommen hat und die Sauerstoffkonzentration im Behälter ein Begehen zuläßt, mit geringem Aufwand entfernt werden.Many containers in the chemical industry are lined with a rubber coating to counteract chemical, thermal or mechanical damage. These rubbers wear out over time and have to be removed and replaced with new rubbers. The gumming can be removed with the help of chemical solvents, by burning off or by purely manual removal. These processes are time-consuming, costly and sometimes environmentally harmful. When the rubber coating burns off, structural changes can also occur of the container material. Attempts have therefore been made to embrittle the rubber coating by injecting liquid nitrogen. For this purpose, one or more ring lines provided with nozzles are attached to the inside of the container and liquid nitrogen is sprayed through the nozzles into the interior of the container. Under the influence of the cold of the evaporating nitrogen, the container wall, usually made of steel, and the container rubberizing shrink. Due to the different thermal expansion coefficients of rubber and steel, shear forces occur in the composite, which are compensated for at the beginning of the cooling process by the elastic behavior of the rubber coating. With further spraying of liquid nitrogen, low temperatures are finally reached, namely -100 ° C to -150 ° C, at which the rubber coatings harden completely and become brittle. You can then no longer compensate for the increasing shear forces by changing the shape. Finally, the bond is destroyed without external mechanical forces acting on it. After the container has returned to ambient temperature and the oxygen concentration in the container permits walking on, the rubber that has been blasted off can be removed with little effort.
Diese Methode zum Entgummieren funktioniert bei kleinen Behältern recht gut. Bei Großbehältern sind jedoch hierbei schon Materialschäden verursacht worden. Diese entstehen durch das ungleichmäßige Einkühlen der großen Behälter. Bei großen Behältern fällt wegen seiner größeren spezifischen Dichte kaltes Gas in den unteren Behälterbereich. Nach oben hin wird die Temperatur des verdampften Stickstoffs im Behälter immer höher. Dadurch stellt sich über die Höhe des Behälters ein unerwünschter Temperaturgradient ein, aus dem zusätzlich Spannungen im Behälteraufbau resultieren.This method of rubber removal works quite well for small containers. In the case of large containers, however, material damage has already been caused. These are caused by the uneven cooling of the large containers. In the case of large containers, cold gas falls into the lower part of the container due to its greater specific density. The temperature of the evaporated nitrogen in the container increases. This results in an undesirable temperature gradient over the height of the container, from which additional stresses result in the container structure.
Diese zusätzlichen Spannungen sind an sich gering und könnten vom Behälterwerkstoff ohne weiteres aufgenommen werden. Im Zusammenwirken mit weiteren Spannungen können sich aber unzulässige Belastungen des Behälterwerkstoffes ergeben. Diese weiteren Spannungen sind Eigenspannungen bekannter Größe und Wirkrichtung sowie zusätzliche Spannungen aus der Abkühlgeschwindigkeit. Hierzu kommen nun die zusätzlichen Spannungen durch ein inhomogenes Temperaturfeld beim Abkühlen und schließlich auch im abgekühlten stationären Zustand. Unter ungünstigen Bedingungen können hieraus Spannungen resultieren, die den Behälter schädigen oder sogar zerstören. Hierbei ist auch zu bedenken, daß viele Behälterwerkstoffe, z.B. ferritischer Stahl, bei tiefen Temperaturen eine nur noch geringe Kerbschlagzähigkeit aufweisen. Aus diesen Gründen ist man wieder davon abgegangen, Großbehälter durch Eindüsen von flüssigem Stickstoff zu entgummieren.These additional tensions are low in themselves and could easily be absorbed by the container material. In combination with other tensions, impermissible loads on the container material can result. These additional stresses are residual stresses of known size and direction of action as well as additional stresses from the cooling rate. In addition, there are the additional voltages due to an inhomogeneous temperature field during cooling and finally also in the cooled stationary state. Under unfavorable conditions, this can result in tensions that damage or even destroy the container. It should also be borne in mind that many container materials, e.g. ferritic steel, only have low impact strength at low temperatures. For these reasons, it has again been assumed that large containers can be degummed by injecting liquid nitrogen.
Der Erfindung liegt daher die Aufgabe zugrunde, eine Vorrichtung zu schaffen, die es ermöglicht, auch große Behälter durch Beaufschlagen mit flüssigem Stickstoff zu entgummieren, ohne daß zusätzliche Spannungen entstehen können, die zu einer Schädigung des Behältermaterials führen würden.The invention is therefore based on the object of providing a device which makes it possible to degumize even large containers by applying liquid nitrogen, without additional stresses being able to result which would damage the container material.
Ausgehend von dem im Oberbegriff des Anspruches 1 berücksichtigten Stand der Technik ist diese Aufgabe erfindungsgemäß gelöst mit den im kennzeichnenden Teil des Anspruches 1 angegebenen Merkmalen. Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben.Starting from the prior art taken into account in the preamble of claim 1, this object is achieved according to the invention with the features specified in the characterizing part of claim 1. Advantageous developments of the invention are specified in the subclaims.
Mit der erfindungsgemäßen Vorrichtung wird somit flüssiger Stickstoff in bekannter Weise über ein Düsensystem in den zu entgummierenden Behälter eingetragen. Hier entzieht der Stickstoff dem Behälter und der Gummierung Wärme, verdampft und strömt über einen Abgasstutzen ins Freie.With the device according to the invention, liquid nitrogen is thus introduced in a known manner via a nozzle system into the container to be degummed. Here withdrawn the nitrogen warms the container and the rubber coating, evaporates and flows outside through an exhaust pipe.
Wesentlich für die erfindungsgemäße Vorrichtung ist jedoch, daß mit ihr der flüssige Stickstoff nicht willkürlich über das Düsensystem eingesprüht wird, sondern so kontrolliert, daß sich ein homogenes Temperaturfeld aufbauen kann. Hierzu dient die von der erfindungsgemäßen Vorrichtung bewirkte Kaltgasumwälzung. Das kälteste Stickstoffgas aus dem Behälterboden wird mittels der Leitung durch den Ventilator abgesaugt und in den oberen Teil des Behälters gefördert, wo die Temperatur des Stickstoffs an sich höher ist. Wenn zusätzlich die Abkühlgeschwindigkeit gering gehalten wird, vorzugsweise zwischen 10 und 20 K/h, bildet sich ein außerordentlich homogenes Temperaturfeld über die Höhe des einzukühlenden Behälters aus. Die thermischen Spannungen, die aus der Temperaturänderung resultieren und die Eigenspannungen überlagern, bleiben daher vernachlässigbar klein und treten gleichmäßig verteilt in der Behälterwand auf. Mit der erfindungsgemäßen Vorrichtung ist es möglich, auch Behälter aus Werkstoffen durch Abkühlung mit flüssigem Stickstoff zu entgummieren, die bei tiefen Temperaturen nur noch eine geringe Kerbschlagzähigkeit aufweisen. Die mit Hilfe der erfindungsgemäßen Vorrichtung mögliche kontrollierte Abkühlung unter Ausbildung eines homogenen Temperaturfeldes über die Behälterhöhe verursacht weder permanente Gefügeänderungen in ferritischem oder austhenitischem Stahl noch bewirkt sie Änderungen der mechanischen Festigkeitswerte.It is essential for the device according to the invention, however, that the liquid nitrogen is not sprayed with it arbitrarily via the nozzle system, but rather is controlled in such a way that a homogeneous temperature field can build up. The cold gas circulation caused by the device according to the invention serves this purpose. The coldest nitrogen gas from the bottom of the tank is drawn off through the fan through the line and transported to the upper part of the tank, where the temperature of the nitrogen itself is higher. If the cooling rate is also kept low, preferably between 10 and 20 K / h, an extraordinarily homogeneous temperature field is formed over the height of the container to be cooled. The thermal stresses resulting from the change in temperature and superimposing the residual stresses therefore remain negligibly small and occur evenly distributed in the container wall. With the device according to the invention, it is also possible to degumify containers made of materials by cooling with liquid nitrogen, which only have a low impact strength at low temperatures. The controlled cooling possible with the aid of the device according to the invention, with the formation of a homogeneous temperature field over the container height, does not cause permanent structural changes in ferritic or austenitic steel, nor does it cause changes in the mechanical strength values.
Die Leitung und der zugehörige Ventilator können an sich beliebig gestaltet sein. Der Ventilator kann auch an beliebiger Stelle der Leitung angeordnet werden. Vorteilhaft ist es jedoch, wenn der Ventilator als ein am oberen Teil der Leitung angeordnetes Käfiglaufrad ausgebildet ist, welches das angesaugte kalte Gas aus dem Behälterboden radial in den oberen Teil des Behälters ausstößt. Diese radiale Strömungsrichtung kann jedoch auch durch Umlenkeinrichtungen bewirkt werden. Wenn der Ventilator am oberen Teil der Leitung angeordnet wird, kann seine Verbindung zum Antrieb kurz gehalten werden. Der Antrieb selbst liegt zweckmäßigerweise außerhalb des Behälters. Die Leitung wird zweckmäßigerweise als Rohr ausgebildet. Um den Einsatz der Vorrichtung in verschieden großen Behältern zu ermöglichen, wird das Rohr zweckmäßigerweise längenverstellbar ausgebildet. Dies kann durch zwei teleskopartig ineinanderschiebbare Einzelrohre erreicht werden.The line and the associated fan can be designed as desired. The fan can also be placed anywhere on the line. However, it is advantageous if the fan is at the top Part of the line arranged cage impeller is formed, which radially ejects the sucked cold gas from the bottom of the container into the upper part of the container. However, this radial flow direction can also be brought about by deflection devices. If the fan is placed on the upper part of the line, its connection to the drive can be kept short. The drive itself is expediently outside the container. The line is expediently designed as a tube. In order to enable the device to be used in containers of different sizes, the tube is expediently designed to be adjustable in length. This can be achieved by means of two telescoping single tubes.
Als Leitung kann jedoch auch ein Schlauch verwendet werden. Bei Verwendung eines Wellschlauches ergeben sich ebenfalls sehr einfache Möglichkeiten zur Längenverstellung der Leitung.However, a hose can also be used as a line. When using a corrugated hose, there are also very simple options for adjusting the length of the line.
Bei sehr großen Behältern können auch mehrere mit Ventilatoren bestückte Leitungen parallel eingesetzt werden. Der Aufwand zur Montage der erfindungsgemäßen Vorrichtung ist denkbar gering. Auch der Einsatz im Exbereich und bei sehr tiefen Temperaturen, d.h. unter -180 °C, ist ohne weiteres möglich. Mit der erfindungsgemäßen Vorrichtung kann die umweltfreundliche kryogene Entgummierung auch bei Großbehältern durchgeführt werden, ohne daß Werkstoffschäden entstehen können.In the case of very large tanks, several lines equipped with fans can also be used in parallel. The effort required to assemble the device according to the invention is very small. Use in hazardous areas and at very low temperatures, i.e. below -180 ° C is easily possible. With the device according to the invention, the environmentally friendly cryogenic degumming can also be carried out on large containers without material damage being able to occur.
Die Zeichnung veranschaulicht ein Ausführungsbeispiel der Erfindung in schematischer Form.The drawing illustrates an embodiment of the invention in schematic form.
Dargestellt ist ein Großbehälter 1, dessen Gummierung durch Beaufschlagung mit flüssigem Stickstoff versprödet und abgesprengt werden soll. Der flüssige Stickstoff wird über zwei mit Düsen versehene Ringleitungen 2 in das Behälterinnere versprüht. Der flüssige Stickstoff wird einem Standtank 3 entnommen und gelangt durch die Leitungen 4, 4a und 4b in die Ringleitungen 2. Das verdampfte Stickstoffgas entweicht durch den Abgasstutzen 5 ins Freie. Erfindungsgemäß ist in axialer Richtung im Behälter ein Wellschlauch 6 angeordnet, der sich bis in den Bodenbereich des Großbehälters 1 erstreckt. Am oberen Teil des Wellschlauches 6 ist ein als Käfiglaufrad ausgebildeter Ventilator 7 angeordnet, dessen elektrischer Antrieb 8 sich außerhalb des Großbehälters 1 befindet. Der Ventilator 7 saugt das kalte Stickstoffgas aus dem Boden des Behälters durch den Wellschlauch 6 in den oberen Teil des Großbehälters 1. Hier tritt das angesaugte Gas in radialer Richtung aus. Die Strömungsrichtungen sind durch nicht näher bezeichnete Pfeile dargestellt. Der verdampfte Stickstoff wird deshalb ständig im Großbehälter 1 umgewälzt, und zwar in der Weise, daß Stickstoff aus dem kältesten Teil des Behälters in den wärmsten Teil gefördert wird. Ein der eingedüsten Menge flüssigen Stickstoffs entsprechende Menge gasförmigen Stickstoffs entweicht ständig durch den Abgasstutzen 5.A large container 1 is shown, the rubber coating of which embrittles when exposed to liquid nitrogen and should be blown up. The liquid nitrogen is sprayed into the interior of the container via two
Die Kaltgasumwälzung bewirkt an sich schon die Ausbildung eines sehr homogenen Temperaturfeldes über die Höhe des Großbehälters 1. Zusätzlich wird noch die Abkühlgeschwindigkeit gering gehalten. Diese wird durch zahlreiche Temperaturmeßstellen 9 kontrolliert, indem mit Hilfe einer Temperaturmeß- und Regeleinheit 10 der flüssige Stickstoff durch die Magnetventile 11 in den Leitungen 4a und 4b den Erfordernissen entsprechend in die Ringleitungen 2 dosiert wird. Anstelle des Wellschlauches 6 kann selbstverständlich auch ein starres Rohr eingesetzt werden.The cold gas circulation causes the formation of a very homogeneous temperature field over the height of the large container 1. In addition, the cooling rate is kept low. This is controlled by numerous temperature measuring points 9 by using a temperature measuring and
Claims (4)
gekennzeichnet durch wenigstens eine in axialer Richtung angeordnete sich vom oberen Teil des Behälters bis in dessen Bodenbereich erstreckende Leitung, der ein Ventilator (7) zugeordnet ist, um eine Umwälzung von verdampftem Stickstoff aus dem unteren Teil des Behälters durch die Leitung in den oberen Teil des Behälters zu bewirken.1. Device for cooling rubberized large containers (1) with liquid nitrogen for the purpose of embrittlement and removal of the rubber coating, with at least one ring line (2) provided with nozzles for introducing the liquid nitrogen into the interior of the container,
characterized by at least one line arranged in the axial direction and extending from the upper part of the container to the bottom region thereof, to which a fan (7) is assigned in order to circulate vaporized nitrogen from the lower part of the container through the line into the upper part of the Effect container.
dadurch gekennzeichnet,
daß die Leitung als Rohr ausgebildet ist.2. Device according to claim 1,
characterized,
that the line is designed as a tube.
dadurch gekennzeichnet,
daß das Rohr längenverstellbar durch teleskopartig ineinanderschiebbare Einzelrohre ausgebildet ist.3. Device according to claim 2,
characterized,
that the tube is adjustable in length by telescopically telescoping individual tubes.
dadurch gekennzeichnet,
daß der Ventilator aus einem am oberen Teil der Leitung angeordneten Käfiglaufrad mit außenliegendem Antrieb (8) besteht.4. Device according to one of claims 1 to 3,
characterized,
that the fan consists of a cage impeller with an external drive (8) arranged on the upper part of the line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT87107007T ATE72195T1 (en) | 1986-06-12 | 1987-05-14 | DEVICE FOR COOLING LARGE RUBBER-LINED CONTAINERS WITH LIQUID NITROGEN. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3619788 | 1986-06-12 | ||
| DE19863619788 DE3619788A1 (en) | 1986-06-12 | 1986-06-12 | DEVICE FOR COOLING GUMMED LARGE TANKS WITH LIQUID NITROGEN |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0249047A2 true EP0249047A2 (en) | 1987-12-16 |
| EP0249047A3 EP0249047A3 (en) | 1988-09-21 |
| EP0249047B1 EP0249047B1 (en) | 1992-01-29 |
Family
ID=6302866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP87107007A Expired - Lifetime EP0249047B1 (en) | 1986-06-12 | 1987-05-14 | Arrangement for cooling rubber-coated large containers with fluid nitrogen |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4768535A (en) |
| EP (1) | EP0249047B1 (en) |
| JP (1) | JPS6345006A (en) |
| AT (1) | ATE72195T1 (en) |
| DE (1) | DE3619788A1 (en) |
| ZA (1) | ZA874192B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE1008422A3 (en) * | 1994-07-08 | 1996-05-07 | Oxhydrique Internationale L | Method for demolishing metal tanks |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5606860A (en) * | 1994-03-07 | 1997-03-04 | Popp; James L. | Process and apparatus for cryogenically cleaning residue from containers and reducing the bulk volume thereof |
| US5887750A (en) * | 1994-03-07 | 1999-03-30 | James L. Popp | Commodity container |
| US5456085A (en) * | 1994-03-07 | 1995-10-10 | Popp; James L. | Process and apparatus for cryogenically cleaning residue from containers and reducing the bulk volume thereof |
| US6149732A (en) | 1998-10-28 | 2000-11-21 | Genca Corporation | Method and apparatus for removing plastic residue |
| CA2371155C (en) | 2002-02-08 | 2003-06-10 | Consolidated Civil Enforcement Inc. | Method of removing stators from tubular stator housings |
| US20040226587A1 (en) * | 2003-05-16 | 2004-11-18 | Michel Lemire | Sand removal system |
| CA2500611A1 (en) * | 2005-03-04 | 2006-09-04 | Quadra Industrial Services Ontario Inc. | Method of removing the fused non-ferrous or ferrous metal stickers from slag pot ladles |
| US7621148B1 (en) | 2007-08-07 | 2009-11-24 | Dain John F | Ultra-low temperature bio-sample storage system |
| US7823394B2 (en) * | 2007-11-02 | 2010-11-02 | Reflect Scientific, Inc. | Thermal insulation technique for ultra low temperature cryogenic processor |
| US20150226530A1 (en) * | 2009-10-29 | 2015-08-13 | Felix M. Batts | Device for generating large volumes of smoke |
| CN101985198A (en) * | 2010-10-29 | 2011-03-16 | 无锡巨力重工机械有限公司 | Novel liquid nitrogen cold assembly device |
| JP5988905B2 (en) * | 2013-03-22 | 2016-09-07 | 大陽日酸株式会社 | Subzero processing device |
| CN106179670B (en) * | 2016-08-30 | 2018-09-28 | 宁波市先倡电子科技有限公司 | A kind of ultrasonic grind decentralized processing equipment and processing method |
| CN115235158B (en) * | 2022-07-29 | 2023-06-20 | 浙江歌文达生物医药科技有限公司 | Cooling device is used in lansoprazole production |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE833047C (en) * | 1943-09-21 | 1952-03-03 | Linde Eismasch Ag | Cold chamber |
| US3196774A (en) * | 1962-06-27 | 1965-07-27 | Behlen Mfg Company Inc | Method of and means for circulating air within closed buildings |
| GB1452082A (en) * | 1972-10-31 | 1976-10-06 | Osaka Gas Co Ltd | Method and an apparatus for cooling goods by contacting the goods with a low temperature gas |
| DE2525951A1 (en) * | 1975-06-11 | 1976-12-23 | Kueleg Kuehlmoebelfabrik U App | Deep freeze device for food products - food trays on endless conveyor move through cooled freezer interior |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1720549A (en) * | 1925-06-19 | 1929-07-09 | William A Gilchrist | Apparatus for and process of mixing |
| US2662042A (en) * | 1950-02-01 | 1953-12-08 | Sun Oil Co | Progess for cleaning refining equipment |
| NL301206A (en) * | 1962-12-07 | 1900-01-01 | ||
| US3288259A (en) * | 1965-03-01 | 1966-11-29 | Dymo Industries Inc | Embossing tool for selectively accommodating material of different sizes |
| US3623910A (en) * | 1969-11-28 | 1971-11-30 | Flex Kleen Corp | Method and apparatus for laundering dust collectors |
| DE2557870A1 (en) * | 1975-12-22 | 1977-06-23 | Linde Ag | METHOD AND DEVICE FOR FREEZING BIOLOGICAL SUBSTANCES |
| DE3003987C2 (en) * | 1980-02-04 | 1984-10-31 | Messer Griesheim Gmbh, 6000 Frankfurt | Thermally insulated small container for the transport of refrigerated food for several hours |
-
1986
- 1986-06-12 DE DE19863619788 patent/DE3619788A1/en active Granted
-
1987
- 1987-05-14 AT AT87107007T patent/ATE72195T1/en not_active IP Right Cessation
- 1987-05-14 EP EP87107007A patent/EP0249047B1/en not_active Expired - Lifetime
- 1987-05-14 US US07/049,508 patent/US4768535A/en not_active Expired - Lifetime
- 1987-06-04 JP JP62139090A patent/JPS6345006A/en active Pending
- 1987-06-11 ZA ZA874192A patent/ZA874192B/en unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE833047C (en) * | 1943-09-21 | 1952-03-03 | Linde Eismasch Ag | Cold chamber |
| US3196774A (en) * | 1962-06-27 | 1965-07-27 | Behlen Mfg Company Inc | Method of and means for circulating air within closed buildings |
| GB1452082A (en) * | 1972-10-31 | 1976-10-06 | Osaka Gas Co Ltd | Method and an apparatus for cooling goods by contacting the goods with a low temperature gas |
| DE2525951A1 (en) * | 1975-06-11 | 1976-12-23 | Kueleg Kuehlmoebelfabrik U App | Deep freeze device for food products - food trays on endless conveyor move through cooled freezer interior |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE1008422A3 (en) * | 1994-07-08 | 1996-05-07 | Oxhydrique Internationale L | Method for demolishing metal tanks |
Also Published As
| Publication number | Publication date |
|---|---|
| US4768535A (en) | 1988-09-06 |
| EP0249047A3 (en) | 1988-09-21 |
| DE3619788C2 (en) | 1989-03-30 |
| EP0249047B1 (en) | 1992-01-29 |
| ZA874192B (en) | 1987-12-14 |
| ATE72195T1 (en) | 1992-02-15 |
| DE3619788A1 (en) | 1987-12-17 |
| JPS6345006A (en) | 1988-02-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0249047B1 (en) | Arrangement for cooling rubber-coated large containers with fluid nitrogen | |
| EP0468024B1 (en) | Injection device for on-line wet cleaning of compressors | |
| DE19926119C2 (en) | Blasting tool | |
| EP0571426B1 (en) | Process for cleaning workpieces contaminated with organic matter | |
| EP1375684B2 (en) | Process for the manufacture of bearing rings for large rolling bearings | |
| DE3315465A1 (en) | METHOD FOR LINING TUBES IN A PIPELINE | |
| DE3728557A1 (en) | Process for the distribution of ammonia in a gas stream and apparatus for carrying out the process | |
| DE102011013742A1 (en) | Process for producing molded articles from fiber-reinforced composite materials | |
| EP0761345A2 (en) | Hot chamber die casting machine | |
| DE102015105680A1 (en) | Coating device for internal coating of pipelines | |
| DE3526193A1 (en) | METHOD AND DEVICE FOR PRE-TREATING A GROUND PIPE TO BE REPLACED BY A NEW PIPELINE | |
| DE729469C (en) | Device for spraying paint liquids onto the inner walls of hollow bodies, in particular pipes | |
| DE2440415C2 (en) | ||
| DE19926084A1 (en) | Suction cleaning device encloses object by rectangular tube ring with gas ports along inside and with tube section designed to vorticize exhaust air within tube as linked to controlable fans. | |
| DE2542769A1 (en) | DEVICE FOR THE EXTERNAL COATING OF ENDLESS METAL PIPES | |
| DE10137711A1 (en) | Method for coating surfaces with a multicomponent mixture of plastic materials involves heating to produce degassing temperatures, cooling to ensure a presence of liquid phases, and reheating to lower viscosities | |
| DE102016013435A1 (en) | Device and method for gluing particles | |
| WO1985004614A1 (en) | Process and apparatus for subjecting workpieces, construction elements or similar to an air jet laden with granular particles | |
| EP0832719B1 (en) | Wet-blast installation | |
| EP1792666A2 (en) | Automated cleaning of open containers | |
| EP0503299B1 (en) | Method and apparatus for freezing fluids in pipelines | |
| DE19853304C2 (en) | Process for drying a workpiece | |
| DE847180C (en) | Device for spraying mortar or the like. | |
| DE863019C (en) | Device for the production of protective coats | |
| DE69109004T2 (en) | Sealing method and device. |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE CH FR GB IT LI NL SE |
|
| PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
| AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AT BE CH FR GB IT LI NL SE |
|
| 17P | Request for examination filed |
Effective date: 19890309 |
|
| 17Q | First examination report despatched |
Effective date: 19901025 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH FR GB IT LI NL SE |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT Effective date: 19920129 Ref country code: SE Effective date: 19920129 |
|
| REF | Corresponds to: |
Ref document number: 72195 Country of ref document: AT Date of ref document: 19920215 Kind code of ref document: T |
|
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) | ||
| ET | Fr: translation filed | ||
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed | ||
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 20040505 Year of fee payment: 18 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20040510 Year of fee payment: 18 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: AT Payment date: 20040512 Year of fee payment: 18 Ref country code: GB Payment date: 20040512 Year of fee payment: 18 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 20040517 Year of fee payment: 18 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 20040715 Year of fee payment: 18 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20050514 Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20050514 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20050531 Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20050531 Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20050531 |
|
| BERE | Be: lapsed |
Owner name: *MESSER GRIESHEIM G.M.B.H. Effective date: 20050531 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20051201 |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20050514 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20060131 |
|
| NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee |
Effective date: 20051201 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20060131 |
|
| BERE | Be: lapsed |
Owner name: *MESSER GRIESHEIM G.M.B.H. Effective date: 20050531 |